A parody of Aim for the Ace! (エースを狙え Ace wo nerae!?), a tennis manga. Similar characters to that in the manga include "Madam Butterfly", a rich snob of a professional tennis player, and Hiromi, her suffering opponent.
The story is set in Bakumatsu and revolves around the Bunta Sugawara character, a yakuza (of course :) but instead of a modern yakuza/gangster, he's a gambler/bakuto). After he kills someone and gets wound, is saved by a blind woman (Mitsuko Baishô), who took care of him. They has a happy time under the protection of the Tomisaburo Wakayama character, an oybun. But of course, happy time doesn't last long. The story is also related to Okada Izo and the Shinsengumi (w/ Kondo Isami played by Makoto Sato)